Deere Kevin C, Hannam Kimberly, Coulson Jessica, Ireland Alex, McPhee Jamie S, Moss Charlotte, Edwards Mark H, Dennison Elaine, Cooper Cyrus, Sayers Adrian, Lipperts Matthijs, Grimm Bernd, Tobias Jon H
Musculoskeletal Research Unit, School of Clinical Sciences, University of Bristol, Bristol, UK.
J Aging Phys Act. 2016 Apr;24(2):290-5. doi: 10.1123/japa.2015-0066. Epub 2015 Sep 15.
Physical activity (PA) may need to produce high impacts to be osteogenic. The aim of this study was to identify threshold(s) for defining high impact PA for future analyses in the VIBE (Vertical Impact and Bone in the Elderly) study, based on home recordings with triaxial accelerometers. Recordings were obtained from 19 Master Athlete Cohort (MAC; mean 67.6 years) and 15 Hertfordshire Cohort Study (HCS; mean 77.7 years) participants. Data cleaning protocols were developed to exclude artifacts. Accelerations expressed in g units were categorized into three bands selected from the distribution of positive Y-axis peak accelerations. Data were available for 6.6 and 4.4 days from MAC and HCS participants respectively, with approximately 14 hr recording daily. Three-fold more 0.5-1.0g impacts were observed in MAC versus HCS, 20-fold more 1.0-1.5g impacts, and 140-fold more impacts ≥ 1.5g. Our analysis protocol successfully distinguishes PA levels in active and sedentary older individuals.
体育活动(PA)可能需要产生高强度冲击才能促进成骨。本研究的目的是基于使用三轴加速度计进行的家庭记录,确定高强度PA的阈值,以便在VIBE(老年人垂直冲击与骨骼)研究中进行未来分析。记录来自19名大师级运动员队列(MAC;平均年龄67.6岁)和15名赫特福德郡队列研究(HCS;平均年龄77.7岁)的参与者。制定了数据清理方案以排除伪影。以g为单位表示的加速度被分为从正Y轴峰值加速度分布中选取的三个频段。MAC和HCS参与者分别有6.6天和4.4天的数据可用,每天记录约14小时。与HCS相比,MAC中观察到的0.5-1.0g冲击多三倍,1.0-1.5g冲击多20倍,≥1.5g冲击多140倍。我们的分析方案成功地区分了活跃和久坐的老年人的PA水平。